package test
{
	import flash.display.Bitmap;
	import flash.display.BitmapData;
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.events.MouseEvent;
 
	public class JSCanvasPort extends Sprite
	{
		public function JSCanvasPort()
		{
			super();
			addChild( canvas = new Bitmap() );
			canvas.smoothing = false;
			canvas.scaleX = canvas.scaleY = 2;
			draw();
 
			addEventListener( MouseEvent.CLICK , handleClick );
		}
 
		private var playing:Boolean = false;
 
		public function handleClick( e:Event = null ) : void {
			if ( playing )
				removeEventListener( Event.ENTER_FRAME , enterframe );
			else
				addEventListener( Event.ENTER_FRAME , enterframe );
			playing = !playing;
		}
		public function enterframe( e:Event=null ) : void {
			draw();
		}
 
		public var time:Number=0;
		public var maxr:Number=64.0;
		public var canvas:Bitmap;
 
		public function distance(ax:Number,ay:Number,az:Number,bx:Number,by:Number,bz:Number):Number{
			var dx:Number=bx-ax , dy:Number=by-ay , dz:Number=bz-az;
		    return Math.sqrt( dx*dx + dy*dy + dz*dz );
		}
		public function obj(x:Number,y:Number,z:Number,t:Number):Number{
		        var f:Number=1.0;
		        f*=distance(x,y,z,Math.cos(t)+Math.sin(t*0.2),0.3,2.0+Math.cos(t*0.5)*0.5);
		        f*=distance(x,y,z,-Math.cos(t*0.7),0.3,2.0+Math.sin(t*0.5));
		        f*=distance(x,y,z,-Math.sin(t*0.2)*0.5,Math.sin(t),2.0);
		        f*=Math.cos(y)*Math.cos(x)-0.1-Math.cos(z*7.0+t*7.0)*Math.cos(x*3.0)*Math.cos(y*4.0)*0.1;
		        return f;
		}
 
		public function eval(x:Number,y:Number,t:Number):uint{
		   var vx:Number=x*2.0-1.0; var vy:Number=-y*2.0+1.0;
		   var s:Number=0.4;
		   var ox:Number=vx;var oy:Number=vy*1.25;var oz:Number=0.0;
		   var dx:Number=(vx+Math.cos(t)*0.3)/64.0;var dy:Number=vy/64.0;var dz:Number=1.0/64.0;
		   var tt:Number=0.0;
		   var g:Number=1.0;
		   while((g>s)&&(tt<375)){
		         g=obj(ox+dx*tt,oy+dy*tt,oz+dz*tt,t);
		         tt+=g*4;
		   };
		   var color:Number=0.0;
		   var dxtt:Number=ox+dx*tt;var dytt:Number=oy+dy*tt;var dztt:Number=oz+dz*tt;
		   var objd:Number=obj(dxtt,dytt,dztt,t);
		   var nx:Number=objd-obj(dxtt+0.01,dytt,dztt,t);
		   var ny:Number=objd-obj(dxtt,dytt+0.01,dztt,t);
		   var nz:Number=objd-obj(dxtt,dytt,dztt+0.01,t);
		   var d:Number=Math.sqrt(nx*nx+ny*ny+nz*nz);ny=ny/d;nz=nz/d;
		   color+=Math.max(-0.5*nz,0.0)+Math.max(-0.5*ny+0.5*nz,0.0)*0.5;
		   var r:Number=(color+0.1*tt*0.025);
		   var g:Number=(color+0.2*tt*0.025);
		   var b:Number=(color+0.5*tt*0.025);
		   return getRGB(r,g,b);
		}
 
		public function getRGB(r:Number,g:Number,b:Number):uint{
		        if (r<0) r=0; else if (r>1) r=1;
		        if (g<0) g=0; else if (g>1) g=1;
		        if (b<0) b=0; else if (b>1) b=1;
			return ((r*255)&255) << 16 | ((g*255)&255) << 8 | ((b*255)&255);
		}
 
		public function draw():void{
			if ( canvas.bitmapData == null ) {
				canvas.bitmapData = new BitmapData( maxr , maxr , false , 0xffffff );
			}
			var t:BitmapData = canvas.bitmapData;
			time+=0.1;
			t.lock();
		        for(var x:Number=0;x<maxr;x++){
		                var px:Number=x/maxr;
		                for(var y:Number=0;y<maxr;y++){
		                        var py:Number=y/maxr;
		                        t.setPixel( x , y , eval(px,py,time) );
		                }
		        }
		   t.unlock();
		};
 
	}
}